Products > Test Equipment
Budget ($150-$400) scope recommendations?
<< < (6/10) > >>
nctnico:

--- Quote from: 2N3055 on July 10, 2022, 07:53:43 pm ---
--- Quote from: nctnico on July 08, 2022, 07:38:41 pm ---
--- Quote from: Performa01 on July 08, 2022, 06:01:22 pm ---
--- Quote from: kissel on July 08, 2022, 05:31:46 pm ---One more question: With my lack of experience, it makes me a little nervous to think of spending $400ish on a scope. How robust/repairable are they? In other words, what are the odds that in the process of learning how to use a scope I accidentally cause expensive or irreparable damage?

--- End quote ---

Don't worry. You'll hardly be able to damage a Siglent DSO with its 400Vp tolerant inputs, unless you directly feed it with the output of a powerful transmitter.

--- End quote ---
This is true for any general purpose benchtop oscilloscope! They all survive connecting a 1:1 probe to mains voltages.

--- End quote ---

Scope 20X times more expensive than SDS1104X-E, the Keysight 3000T series, proudly carries MAX 135V RMS on its front panel, next to inputs... That is a bit less than 200V peak, AC+DC..

--- End quote ---
In that price range you are no longer in the general purpose category! It is not about price but about purpose. Above the toy scopes and below the special purpose scopes, I have not seen any bench oscilloscope that can't handle ball park 300V on the inputs. And that makes sense because these are the kind of scopes that end up in the hands of field technicians and students as well who are likely to make a mistake and hook a probe directly to mains.
tautech:

--- Quote from: nctnico on July 10, 2022, 08:26:02 pm ---
--- Quote from: 2N3055 on July 10, 2022, 07:53:43 pm ---
--- Quote from: nctnico on July 08, 2022, 07:38:41 pm ---
--- Quote from: Performa01 on July 08, 2022, 06:01:22 pm ---
--- Quote from: kissel on July 08, 2022, 05:31:46 pm ---One more question: With my lack of experience, it makes me a little nervous to think of spending $400ish on a scope. How robust/repairable are they? In other words, what are the odds that in the process of learning how to use a scope I accidentally cause expensive or irreparable damage?

--- End quote ---

Don't worry. You'll hardly be able to damage a Siglent DSO with its 400Vp tolerant inputs, unless you directly feed it with the output of a powerful transmitter.

--- End quote ---
This is true for any general purpose benchtop oscilloscope! They all survive connecting a 1:1 probe to mains voltages.

--- End quote ---

Scope 20X times more expensive than SDS1104X-E, the Keysight 3000T series, proudly carries MAX 135V RMS on its front panel, next to inputs... That is a bit less than 200V peak, AC+DC..

--- End quote ---
In that price range you are no longer in the general purpose category!

--- End quote ---
Does that even matter when it can't connect to universal mains voltage in 1x mode.......oh that's right, the world don't even exist for some brands beyond US shores.
2N3055:

--- Quote from: nctnico on July 10, 2022, 08:26:02 pm ---
--- Quote from: 2N3055 on July 10, 2022, 07:53:43 pm ---
--- Quote from: nctnico on July 08, 2022, 07:38:41 pm ---
--- Quote from: Performa01 on July 08, 2022, 06:01:22 pm ---
--- Quote from: kissel on July 08, 2022, 05:31:46 pm ---One more question: With my lack of experience, it makes me a little nervous to think of spending $400ish on a scope. How robust/repairable are they? In other words, what are the odds that in the process of learning how to use a scope I accidentally cause expensive or irreparable damage?

--- End quote ---

Don't worry. You'll hardly be able to damage a Siglent DSO with its 400Vp tolerant inputs, unless you directly feed it with the output of a powerful transmitter.

--- End quote ---
This is true for any general purpose benchtop oscilloscope! They all survive connecting a 1:1 probe to mains voltages.

--- End quote ---

Scope 20X times more expensive than SDS1104X-E, the Keysight 3000T series, proudly carries MAX 135V RMS on its front panel, next to inputs... That is a bit less than 200V peak, AC+DC..

--- End quote ---
In that price range you are no longer in the general purpose category! It is not about price but about purpose. Above the toy scopes and below the special purpose scopes, I have not seen any bench oscilloscope that can't handle ball park 300V on the inputs. And that makes sense because these are the kind of scopes that end up in the hands of field technicians and students as well who are likely to make a mistake and hook a probe directly to mains.

--- End quote ---

Keysight 3000T are as general purpose as they make them... They are on more expensive side but they are nothing but good general purpose scopes. Nothing specialized about them.

Listen, I agree that most scopes are going to be able to handle 300V peak and not explode in microsecond.
I just pointed out that generalizing all of them absolutely will is not true.. And you used that generalization to basically attack Performa he is wrong and biased.
We are all biased, but he is not wrong...
Not ALL general purpose scopes will survive 240VAC directly to input.
Most will though. But not all.
Caliaxy:
Some of them will some of them won’t. We need joesmith move into oscilloscopes. Then we’ll learn how robust our oscilloscopes are  ;D
adam4521:
I appreciate test equipment having good protection, but I think we should be really careful with spec contest on input voltage. The Siglent affordable scopes (like all the lower cost oscilloscopes), ship with 1x/10x probes that have 300V peak-peak rating in 1x mode --> that's 106V rms and none of the system is CAT rated! It is not much help if the oscilloscope survives but the probe that the unsuspecting hobbyist is using is fizzing and shorting in their bare hand!

I can't think of any scenario where it is appropriate to deliberately probe 1:1 near mains voltages. One of the first things I bought was differential probes!
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod